Cycle treadle-bearing.



Patented Dec. 3l, |901.

H. NUWIGK.

CYCLE TBEADLE BEARING.

(Application filed Oct. 4, 1900J (Illu Model.)

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@xvi mono UNiinn Srnfrns PATENT OFFICE.

HEINRICH NOWIGK, OF COLOGNE, GERMANY, ASSIGNOR TO RICHARD ZANDERS, OF BERGISCH-GLADBACH, IN PROVINCE OF RHINELAND,

GERMANY.

vCYCLE TRSEADLE-BEARING.

SPECIFICATION forming part of Letters Patent No. 689,984, dated December 31, 1901. Application iiled October 4, 1900. Serial No. 32,000. (No model) Beit known that I, HEINRICH Nowren, cycle-manufacturer, a subject of the King of Prussia, German Empire, and a resident of Cologne, in the Province of Rhineland and Kingdom of Prussia, Germany, have invented new and useful Improvements in Cycle Treadle-Bearings, of which the following is a specification.

The present invention relates to treadlebearings for cycles. They are intended to make it possible to easily adjust or tighten the various parts of the bearings and to secure the treadle in a very simple and convenient manner, and at the same time while greatly reducing the breadth of the wheel at the treadlebearings to give to the latter a greater length, thus making them run better than is the case with the bearings hitherto in use.

The improvement is shown in the accompanying drawings.

Figure l shows a ,vertical section of the bearing. Fig. 2 gives a section on line A A.

The crank a on the right-hand side engages by means of a short pin a', ending in a kind of wedge b, the part between the ends d of the corresponding longer axle-pin r, split by a slit c in the left crank. According to the degree with which the one crank is tightened against the other the wedge b enters more or less in the corresponding notch of the other pin between the ends d, and the intermediate spaces e are diminished in proportion. In order to form the bearing on the right side and to cause the right crank to be tightened against the left, the following arrangement is made: For a certain length the pin r has an external thread f, into which fits the inner thread of a socket u, which at the outer end opposite the plate in the center ot' the crank a is provided with a plate-like rim running all around. This rim is turned up or back at the edge. This causes a gutter-like space to be formed between zt and o at the outer end for the reception of the bearing-cone and the bearing-cup t', between which the lballs 7a lie and run. The cone g is externally guided with its long arm on the socket fu, already mentioned above. The bearing-cup has on its long arm Z an inner thread by which it is screwed into the so-called box m,whi1e into this box there is likewise screwed from the other side the corresponding cup t' of the left bearing. Into a hollow of the plate in the center of the crank z5, at the left bearing, are fitted the head of the cup fi as well as the cone g, While the pin r has a thickening t in the direction of the crank t, on which the long arm h of the cone g is guided. The alreadymentioned plate on the crank engages by means of a rim w on its inside and passes over the outer top rim of the left bearingcup t' and over the end of the tube-piece to of the cycle-frame, which receives the bearing-box m, as well as the adjoining parts, and from which branch off the diagonal tube or stay a and the lower runs or rear-fork stays a" of the frame. The rim a2 of the plate at the right crank engages the socket u over the bent-back edge of the ring o and is provided with an outside thread. The latter is engaged by the thread of the chain-wheel y, which ou the opposite side has a rim Aw corresponding to the plate rim w of the left crank, the latter rim in its turn engaging the rim or `socket-piece of the cycle-frame. At the point where the rim w engages the wheel y in the direction of the axle the wheel is contin ued in a projecting ring y', which when all parts are fitted lies against the front surface of the bent-back rim of the plate-ring o of the socket u. Vhen the parts are being fitted, y is screwed only a very little with its thread on the outer thread of the rim a2, and then the other parts are fitted together. During this operation the socket u is constantly pressed away from the crank t and toward a by means of a spring s, wound around the pin fr and resting with its outer endagainst the shoulder t and with its inner end against the ring p at the inner end of the socket u. The said inner end of the spring s lies in a longitudinal groove o, formed in the threaded portion f of the pin r and in a corresponding groove on the inside of the ring p, whereby said ring and socket are prevented from turning upon the threaded portion f, while the spring itself is held from turning on the pin `r. The chain-wheel y is then screwed onto the threaded portion a2 to its full extent, so

as to draw a inward and bring the rim edge of the plate of a into contact with the ring y and the rim w' vover upon the outer surface of the adjacent end of the socket-piece The part v will thus hold the chain-Wheely against outward movement, Awhile the said wheel will secure the crank a, in position. By the same operation the Wedge b is pushed between the ends d of the pin r, and thus all parts are finally tightly fitted against each other. The bearings are adjusted or screwed tighter by turning the cups Z in the inner thread at the ends of the boX m on the one hand and on the other hand by turning the ring p and the socket u against the thread f after the spring s with its end that prevents the turning has been drawn out of the groove o. The spring s is not very strong, so that it can easily be removed with the iinger from o, and after p has been turned be made to slip back into its position. By means of the notches q p can be turned with a suitable key.

In order to prevent the crank a from becoming loose in the wheel y when the rider is backing or suddenly stopping--many experiments have proved that this will rarely or never happen-an apparatus may be attached for safety which in this direction com.

pels the wheely to go with the crank a or to remain in connection with it, so that the latter, with regard to y, can make no separate motion or only an exceedingly slight one. Such an apparatus can be attached on the disk of y or to the spokes thus formed in the form of a simple carrier or striking-pin g', placed in the backward direction of a oppol site to y, as close as possible to a, so that the latter on the crank only moving back a little would strike against it, thus being held fast or carrying y along with it. Thus, for instance, a number of holes 5 withtthread could be uniformly distributed on the disk of y or the spokes into which a pin can be screwed from the side pointing toward the crank ct. After the bearing has been tightened as much as possible by turning y this pin is made fast in that hole which in the final position of a to y is the next behind a, (in the direction in which the cycle moves.)

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination with an inclosin g sleeve or socket, of a two-part crank-shaft, one part having a threaded portion and a tapered recess to receive the tapered end of the other part, xed bearing members at the ends of the inclosing' socket, movable bearing members, bearingballs between the fixed and movable bearing-sections, a socket about the shaft and coupling the sections, except as to endwise movement, together and threaded to engage the said threaded portion of the shaft, said socket having a projecting portion bearing against oneI of the aforesaid movable bearing members, an adjusting-ring connected to the inner end of the said threaded socket, means for preventing independent rotation of the threaded member of the shaft and the said threaded socket, a sprocketwheel confined in place by said projecting portion of the socket and having a threaded hub,and cranks carried by the shaft-sections, one of said cranks having a threaded surface to engage the threaded hub of the sprocket- Wheel to draw the shaft-sections together, substantially as described.

2. The combination with an inclosing sleeve or socket, of a twopart crank-shaft, one part having a threaded portion and a tapered recess to receive the tapered end of the other part, fixed bearing members at the ends of the inclosing socket, movable bearing members, bearing-balls between the fixed and movable bearing-sections, a socket about the shaft and coupling the sections, except as to endwise movement, together and threaded to engage the said threaded portion of the shaft, said socket having a portion bearing against one of the aforesaid movable bearing members, an adjusting-ring connected to the inner end of the said threaded socket, a spiral spring encircling the recessed part of the shaft and connected thereto and to the adjusting-ring to hold the same against independent rotation, a sprocket-wheel confined in place by said projecting portion of the socket and havinga threaded hub,and cranks carried by the shaft-sections, one of said cranks having a threaded surface to engage the threaded hub of the sprocket-wheel to draw the shaft-sections together, substantially as described.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

HEINRICH NOVVIGK.

Witnesses:

BR. BRooKHNEv, CHARLES L. SIMPLE.

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